{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x334f3a41a8de64ad9808e5321c981c114f873163c32f720f41d2caea6deb34e2",
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    "signer": "0xfD98e1e1633d68e24edC34Ba08E36BE54aF72f4a",
    "userId": "893473168"
  }
}